I saw Ali holding his left hand with his right at the wrist, above the navel.
حدثنا محمد بن قدامة يعني ابن أعين عن أبي بدر عن أبي طالوت عبد السلام
رأيت عليا رضي الله عنه يمسك شماله بيمينه على الرسغ فوق السرة
No references are available.
[Hasan] Ibn Abu Shayba narrated it, 1/390, from the hadith of Abu Talut through this route, and Bukhari mentioned it as a suspended narration in his Sahih (Fath al-Bari, 3/71, Chapter on Actions During Prayer, chapter 1), and the Hafiz graded it hasan in Taghliq Taliq, 2/443.